Novel Predictive Current Controller for DSTATCOM to Improve Power Quality

Abstract

The Novel predictive current control method for distribution static compensator (DSTATCOM) is proposed in this paper with an improved four-leg topology for load compensation. The source current distorted when a nonlinear load was connected to the grid. When an unbalanced load is connected, the source current becomes unbalanced. Using the proposed technique, converter switching pulses are derived. The desired system behavior is defined by the cost function. By keeping track of reference current, compensation of reactive power, unity power factor is achieved and the supply current turns to balanced and sinusoidal. During the steady and dynamic state scenario, this scheme also removes neutral current. the reactive and harmonic elements of load current derived using synchronous reference frame theory (SRFT). The Novel predictive current control algorithm is effectively employed that monitor reference current and provide sinusoidal source voltage under both steady-state and dynamic scenario at the point of common coupling(PCC).